Motorola GCAI Connector Information for MTM5400 Mobile Terminal Installation

INSTALLATIONMTM5400 Mobile Terminal Installation Manual67

Table 15 25-Pin Back Connector

Back
Connector	Function	Description	Default
Pin
1	GPIO_9	GPIO	Output: Active for duration of call (car
			radio mute)
2	GPIO_6	GPIO	PTT Input, TX audio from
			MIC_REAR_2
3	GPIO_8	GPIO	Disabled
4	GPIO_3	GCAI PIN 2	PTT Input, TX audio from
			MIC_REAR_1
5	VBUS_1B	GCAI PIN 6: 5V Supply	Disabled
6	REAR_D -	GCAI PIN 4: USB D -, GPIO_2	Disabled
		(Shared with the front MMP)
7	REAR_D +	GCAI PIN 8: USB D +, GPIO_1	Disabled
		(Shared with the front MMP)
8	GPIO_0	GCAI PIN 10: GPIO	Input: GCAI detection / Select Line
9	VBUS_2	Second USB 5 V Supply	Disabled
10	TX	4-wire RS232 TX
11	RX	4-wire RS232 RX
12	MIC_REAR_2	Second Rear Microphone	Disabled
13	GND	Ground
14	GPIO_5	GPIO	Disabled
15	GPI_7	4-Level Analogue Input	Enabled
16	1_WIRE	GCAI PIN 1: Bi-directional Serial Bus	Disabled
17	HANDSET	GCAI PIN 3: Handset Audio Output	Parallel to front GCAI
18	GND	GCAI PIN 5: Ground
19	MIC_REAR_1	GCAI PIN 7: Microphone Input	Disabled
20	GPIO_4	GCAI PIN 9: GPIO	Hook Input
21	USB_D +	Second USB D +
22	USB_D -	Second USB D -
23	RTS	4-wire RS232 RTS
24	CTS	4-wire RS232 CTS
25	PWR_ON	Enhanced Control Head Power On
		Input